Slag-free steel tapping and flowing channel of quantum electric arc furnace

Abstract

The utility model discloses a quantum electric arc furnace slag-free tapping steel flowing channel which comprises a furnace lining and a retaining wall, a steelmaking accumulation pool is arranged in the furnace lining, the retaining wall is installed in one side of the furnace lining, a steel flowing channel communicated with the steelmaking accumulation pool is arranged between the bottom of the retaining wall and the inner bottom wall of the furnace lining, and the steel flowing channel is communicated with the steelmaking accumulation pool. At least one flow dividing channel brick is installed in the steel flowing channel, the flow dividing channel brick divides the steel flowing channel into two or more independent flow channels, the inclination angle of the flow channels relative to the horizontal plane is 0 degree, and the widths of the flow channels located on the two sides of the flow dividing channel brick are equal. The flow channels located on the two sides of the flow dividing channel bricks are equal in height. According to the utility model, the double-channel steel flow is adopted, so that the phenomena of end face erosion and damage caused by continuous scouring of the single-channel steel flow channel in the continuous steel-making process are effectively avoided, and the overall service life of the electric arc furnace is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of slag-free steel tapping in a quantum electric arc furnace, and is particularly concerned with a slag-free steel tapping flow channel in a quantum electric arc furnace. Background Art

[0002] The Quantum Electric Arc Furnace (EAF Quantum) steelmaking technology is a new steelmaking technology launched by Siemens VAI Primetals of Germany. The biggest feature of this electric arc furnace is that it has a continuous scrap preheating system and the most advanced environmental protection facilities. The power consumption and environmental emissions per ton of steel are the lowest in the industry. Quantum electric arc furnace steelmaking can significantly reduce production costs, narrow the difference in production costs between electric furnace steel and converter steel, and make the production costs of the two basically the same, providing new impetus for the development of electric furnace steelmaking. The quantum electric arc furnace has also become a favorite project for the transformation or new construction of domestic and foreign steel mills recently.

[0003] However, the overall lifespan of quantum arc furnaces put into production at home and abroad has not met expectations. The main reason is that the steel flow channel of the quantum arc furnace has been severely damaged by molten steel erosion. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to provide a quantum arc furnace slag-free steel flow channel for steel flow, which can improve the service life of the steel mouth of the steel flow channel.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a quantum arc furnace slag-free steel-tapping flow steel channel, comprising a furnace lining and a retaining wall, a steelmaking accumulation pool is arranged in the furnace lining, the retaining wall is installed in one side of the furnace lining, a steel-flowing channel connected to the steel-making accumulation pool is arranged between the bottom of the retaining wall and the inner bottom wall of the furnace lining, at least one diversion channel brick is installed in the steel-flowing channel, and the diversion channel brick divides the steel-flowing channel into two or more independent flow channels.

[0006] The above-mentioned quantum arc furnace slag-free steel flow channel has an inclination angle of 0° relative to the horizontal plane.

[0007] The above-mentioned quantum arc furnace slag-free steel flow channel has equal flow channel widths on both sides of the diversion channel brick; and equal flow channel heights on both sides of the diversion channel brick.

[0008] The above-mentioned quantum arc furnace slag-free steel flow channel has a width of 100 to 300 mm and a height of 100 to 300 mm.

[0009] In the above-mentioned quantum arc furnace slag-free steel-flowing channel, in the direction of molten steel flowing in the steel-flowing channel: the length of the diversion channel brick is equal to the length of the bottom of the retaining wall.

[0010] In the above-mentioned quantum arc furnace slag-free steel-flowing channel, the diversion channel bricks are arranged in parallel with the direction of molten steel flowing in the steel-flowing channel.

[0011] The above-mentioned quantum arc furnace slag-free steel-flowing channel has the following characteristics: on a plane perpendicular to the flow direction of molten steel in the channel: the distances between the two side walls of the diversion channel bricks and the two side walls of the channel are equal.

[0012] In the above-mentioned quantum arc furnace slag-free steel flow channel, the top of the diversion channel brick is connected to the bottom of the retaining wall, and the bottom of the diversion channel brick is connected to the inner bottom wall of the furnace lining.

[0013] The above-mentioned quantum arc furnace slag-free steel-flowing channel has first channel bricks and second channel bricks installed on both side walls of the steel-flowing channel, respectively, the tops of the first channel bricks and the second channel bricks are connected to the bottom of the retaining wall, the bottoms of the first channel bricks and the second channel bricks are connected to the inner bottom wall of the furnace lining, and the lengths of the first channel bricks and the second channel bricks are equal and greater than the length of the diversion channel brick.

[0014] In the above-mentioned quantum arc furnace slag-free steel flow steel channel, the first channel bricks, the second channel bricks and the diversion channel bricks are all magnesia carbon bricks or corundum bricks.

[0015] The technical solution of the utility model has achieved the following beneficial technical effects:

[0016] The utility model adopts double-flow steel flow channels to effectively avoid end surface erosion and damage caused by continuous scouring of a single-flow steel channel during continuous steelmaking, thereby increasing the overall service life of the electric arc furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the main structure of the utility model;

[0018] Figure 2 A side structural schematic diagram of the utility model;

[0019] Figure 3 A schematic diagram of the structure of the utility model from top view.

[0020] The reference numerals in the figure are as follows: 1-furnace lining; 2-steelmaking storage tank; 3-transition tank; 4-retaining wall; 5-steel flow channel; 6-steel outlet; 7-flow channel; 8-diversion channel brick; 9-first channel brick; 10-second channel brick. DETAILED DESCRIPTION

[0021] A quantum arc furnace slag-free steel flow steel channel in this embodiment, such as Figure 1 , Figure 3As shown, it includes a furnace lining 1 and a retaining wall 4, wherein a steelmaking accumulation pool 2 is arranged in the furnace lining 1, wherein the retaining wall 4 is installed in one side of the furnace lining 1, wherein a steel flow channel 5 connected to the steelmaking accumulation pool 2 is arranged between the bottom of the retaining wall 4 and the inner bottom wall of the furnace lining 1, wherein a transition pool 3 is arranged in the furnace lining 1, wherein the transition pool 3 is fluidically connected to the steelmaking accumulation pool 2 through the steel flow channel 5, wherein a steel outlet 6 is arranged on the bottom of the transition pool 3, wherein at least one diversion channel brick 8 is installed in the steel flow channel 5, wherein the diversion channel brick 8 divides the steel flow channel 5 into two or more independent flow channels 7, and wherein, under the condition that the cross-sectional area of ​​the flow channel remains unchanged, the double flow channel can increase the contact and flushing area between the molten steel and the channel bricks and increase the service life of the steel outlet compared to the single flow channel.

[0022] like Figure 1-2 As shown, the inclination angle of the flow channel 7 relative to the horizontal plane is 0°; the width of the flow channels 7 on both sides of the diversion channel brick 8 is equal; the height of the flow channels 7 on both sides of the diversion channel brick 8 is equal; the width of the flow channel 7 is 100-300mm; the height of the flow channel 7 is 100-300mm. By adopting the double flow channel 7 to flow steel, the end surface erosion and damage caused by continuous scouring of the single flow steel channel during the continuous steelmaking process can be effectively avoided, thereby increasing the overall service life of the electric arc furnace.

[0023] like Figure 2-3 As shown, along the direction of the molten steel flowing in the steel flow channel 5: the length of the diversion channel brick 8 is equal to the length of the bottom of the retaining wall 4; the diversion channel brick 8 is arranged along the direction parallel to the flow of the molten steel in the steel flow channel 5; on the plane perpendicular to the flow of the molten steel in the steel flow channel 5: the two side walls of the diversion channel brick 8 are at equal distances from the two side walls of the steel flow channel 5; the top of the diversion channel brick 8 is connected to the bottom of the retaining wall 4, and the bottom of the diversion channel brick 8 is connected to the inner bottom wall of the furnace lining 1.

[0024] like Figure 2-3 As shown, the first channel brick 9 and the second channel brick 10 are respectively installed on the two side walls of the steel flow channel 5, the top of the first channel brick 9 and the second channel brick 10 are connected to the bottom of the retaining wall 4, the bottom of the first channel brick 9 and the second channel brick 10 are connected to the inner bottom wall of the furnace lining 1, and the length of the first channel brick 9 and the second channel brick 10 are equal and greater than the length of the diversion channel brick 8.

[0025] The first channel brick 9, the second channel brick 10 and the diversion channel brick 8 are all magnesia carbon bricks or corundum bricks. The use of corundum bricks can further improve the life of the steel flow channel, thereby achieving the purpose of improving the overall life of the electric furnace and reducing the consumption of refractory materials per ton of steel.

[0026] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A slag-free steel-flowing channel for a quantum arc furnace, comprising a furnace lining (1) and a retaining wall (4), wherein a steel-making accumulation pool (2) is arranged in the furnace lining (1), the retaining wall (4) is installed in one side of the furnace lining (1), and a steel-flowing channel (5) connected to the steel-making accumulation pool (2) is arranged between the bottom of the retaining wall (4) and the inner bottom wall of the furnace lining (1), characterized in that: At least one flow-dividing channel brick (8) is installed in the flow steel channel (5), and the flow-dividing channel brick (8) divides the flow steel channel (5) into two or more mutually independent flow channels (7).

2. The quantum arc furnace slag-free steel flow channel according to claim 1 is characterized in that: The inclination angle of the flow channel (7) relative to the horizontal plane is 0°.

3. The quantum arc furnace slag-free steel flow channel according to claim 1 is characterized in that: The widths of the flow channels (7) on both sides of the flow diversion channel brick (8) are equal; and the heights of the flow channels (7) on both sides of the flow diversion channel brick (8) are equal.

4. A quantum arc furnace slag-free steel flow channel according to claim 3, characterized in that: The width of the flow channel (7) is 100 to 300 mm; the height of the flow channel (7) is 100 to 300 mm.

5. A quantum arc furnace slag-free steel flow channel according to any one of claims 1-4, characterized in that: In the direction of molten steel flowing in the steel flow channel (5), the length of the diversion channel brick (8) is equal to the length of the bottom of the retaining wall (4).

6. A quantum electric arc furnace slag-free steel flow channel according to any one of claims 1-4, characterized in that: The diversion channel bricks (8) are arranged parallel to the direction of flow of molten steel in the steel flow channel (5).

7. A quantum arc furnace slag-free steel flow channel according to any one of claims 1-4, characterized in that: On a plane perpendicular to the flow direction of the molten steel in the steel flow channel (5), the distances between the two side walls of the diversion channel brick (8) and the two side walls of the steel flow channel (5) are equal.

8. A quantum arc furnace slag-free steel flow channel according to any one of claims 1 to 4, characterized in that: The top of the diversion channel brick (8) is connected to the bottom of the retaining wall (4), and the bottom of the diversion channel brick (8) is connected to the inner bottom wall of the furnace lining (1).

9. The quantum arc furnace slag-free steel flow channel according to claim 1, characterized in that: A first channel brick (9) and a second channel brick (10) are respectively installed on the two side walls of the steel flow channel (5); the tops of the first channel brick (9) and the second channel brick (10) are connected to the bottom of the retaining wall (4); the bottoms of the first channel brick (9) and the second channel brick (10) are connected to the inner bottom wall of the furnace lining (1); the lengths of the first channel brick (9) and the second channel brick (10) are equal and greater than the length of the diversion channel brick (8).

10. A quantum arc furnace slag-free steel flow channel according to claim 9, characterized in that: The first channel brick (9), the second channel brick (10) and the branch channel brick (8) are all magnesia carbon bricks or corundum bricks.

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